Question

How many `pi-"electrons"` in benzene?

Answer 1

How many double bonds do you see?

Explanation:

I see 3 here..........And each such double bond represents `2xxpi` electrons, which are conceived to lie above and below the plane of the benzene ring.......

And since there are 3 bonds, there are `3xx2pi` electrons, i.e. `6pi` electrons in total.......

The alternative representation of benzene, an hexagon circumscribing a circle.......

............must be understood to represent those same `6xxpi` electrons.....

How many in this system........?